Judgment of the Court (Fourth Chamber) of 7 December 2023.#RegioJet a. s. and STUDENT AGENCY k.s. v České dráhy a.s. and Others.#Request for a preliminary ruling from the Nejvyšší soud.#Reference for a preliminary ruling – Regulation (EU) 2015/1589 – Existing aid and new aid – Aid granted in disregard of the procedural rules laid down in Article 108(3) TFEU – Expiry of the limitation period provided for in Article 17 of Regulation (EU) 2015/1589 – Obligation on the national court to order the recovery of the aid.#Case C-700/22.